most VN in this site has "choices", that will change the story "a bit" or "a lot", depending how much the choice impact.
example: DMD, you can choose to open or close a relationship with someone, and that will change the story for the MC.
this "game" is more like a kinetic novel. a linear story without choices.
the sandbox allow you to "read" the "chapters" in your own choice, but in the end, you need to follow the story, theres no way to change it.
this kinetic novel offers "bad-ends" that dont change anything in the game, since we need to repeat it until we get the "right" choice, the "only" choice.
so, no, we dont need to eliminate half of the genre, since more VN offers choices.